From the rules translation:
Dexterity game with a bit of memory
Ages: 6 and up
Duration: 15-20 minutes
Bits: 36 cups in 3 different sizes and 4 colors
All cups are placed on the table. Players put together a mix of different colors under their largest cups. Each player then grabs a set of the largest cups of one color. With 2 or 3 players, only use 2 or three colors.
Object: To only have your own color under your cups.
The starting player chooses a player, and points to one of his cups. He then says something like, "The smallest cup in that stack is my color". (He may also choose the middle sized cup in the stack.
The player spoken to uncovers the named cup.
If the guess is correct, the player receives the cup of his color, and gives the other player a cup of the same size from beneath one of his cups. Both sets of cups are uncovered visibly so that all players may see what is beneath them.
The players may then shuffle their cups to try to obscure which cup was just revealed.
A player who made a correct guess goes again. He may choose a stack from the same player, or of a different player. A player can keep going as long as he is right. Once the player misses his guess, then the player whose cup he was guessing takes the next turn.
Whenever a player has to reveal his cups, he is allowed to mix them. Players who have not shown their cups are NOT allowed to mix theirs.
Each player may peek under his own stacks secretly at any time.
End of Game:
The game ends when any one player has only his own color cups under his stacks.